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US4803312A Expired / Lapsed US ⏱️ 0.0 years remaining

Interface between personal computer and telex communication system

Assignee: ASECOM SCL
•
Filing: 1987-05-07
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Granted: 1989-02-07
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Expires: 2007-05-07
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Abstract

Abstract An intelligent interface to enable a personal computer or the like to be used as a telex transceiver.

Inventors

  • 👤 Jose D. Britos

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 11:37
CPC Classifications
H; H04; H04L; H04L17/00; H04L13/00

Claims Analysis

Total Claims: 16
Claim 1
Independent Claim 308 words
An intelligent interface for connecting a personal computer or the like to a communication line in order to transform it into a telex transceiver, said personal or similar computer including an input and output port through which it is possible to receive and/or transmit texts in the accepted characters format, according to a conventional telex norm, and/or receive and/or transmit messages to or from the interface, and a medium of visualization of the text received and to be transmitted, said intelligent interface comprising: a call detector means connected to the communication line; a connecting means in circuit with said line having control means for opening and closing the interface to an input signal to the said call detector means from said communication line; a Baudot signal receiver means having a data input connected to the communication line through said connecting means; a character analyzer means connected to an output of said Baudot signal receiver means that includes command and text detector means; a received texts memory means connected to the output of said Baudot signal receiver means through said character analyzer means and an output connectable to an input of the medium of visualization of the text received, a line exciter means having an output connected to said communication line; Baudot signal transmitter means connected to an input of said exciter means; emerging texts memory means connected to an input of said Baudot signal transmitter means; a parallel to serial converter means which has an output connected to said emerging texts memory means, and an input connected to said input and output port; an answerback memory means connected between said character analyzer means and said Baudot signal transmitter means; an addressees' telex numbers memory means connected to said input and output port; and a dial connected between said addressees' telex numbers memory means, and said line exciter means.
Claim 2
Dependent Claim 308 words
An intelligent interface for connecting a personal computer or the like to a communication line in order to transform it into a telex transceiver, said personal or similar computer including an input and output port through which it is possible to receive and/or transmit texts in the accepted characters format, according to a conventional telex norm, and/or receive and/or transmit messages to or from the interface, and a medium of visualization of the text received and to be transmitted, said intelligent interface comprising: a call detector means connected to the communication line; a connecting means in circuit with said line having control means for opening and closing the interface to an input signal to the said call detector means from said communication line; a Baudot signal receiver means having a data input connected to the communication line through said connecting means; a character analyzer means connected to an output of said Baudot signal receiver means that includes command and text detector means; a received texts memory means connected to the output of said Baudot signal receiver means through said character analyzer means and an output connectable to an input of the medium of visualization of the text received, a line exciter means having an output connected to said communication line; Baudot signal transmitter means connected to an input of said exciter means; emerging texts memory means connected to an input of said Baudot signal transmitter means; a parallel to serial converter means which has an output connected to said emerging texts memory means, and an input connected to said input and output port; an answerback memory means connected between said character analyzer means and said Baudot signal transmitter means; an addressees' telex numbers memory means connected to said input and output port; and a dial connected between said addressees' telex numbers memory means, and said line exciter means.
Claim 3
Dependent Claim 16 words
The intelligent interface of claim 1, wherein said call detector means comprises a line polarity detector.
Claim 4
Dependent Claim 32 words
The intelligent interface of claim 2, wherein said polarity detector comprises a photo emitting diode electrically connected between the said communication line and a phototransistor optically coupled with said photo emitting diode.
Claim 5
Dependent Claim 38 words
The intelligent interface according to claim 1, wherein said connecting means comprises an opto-coupled unit whose input side is connected with the said communication line and whose output side is connected to the said Baudot signal receiver means.
Claim 6
Dependent Claim 63 words
The intelligent interface in accordance with claim 4, wherein said line exciter means embodies a transistor whose input is connected to said Baudot signal transmitter means and a relay which comprises a pair of contacts normally open, connected with said communication lines, and a control coil magnetically coupled with said pair of contacts and electrically connected to the output of the said exciter-transistor.
Claim 7
Dependent Claim 32 words
The intelligent interface according to claim 5, wherein said Baudot signal receiver means embodies a Baudot to ASCII converter; and said Baudot signal transmitter means embodies a converter from ASCII to Baudot.
Claim 8
Dependent Claim 24 words
The intelligent interface of claim number 6, wherein said Baudot to ASCII converter and said ASCII to Baudot converter embody a universal synchronous/asynchronous transceiver.
Claim 9
Dependent Claim 48 words
The intelligent interface of claim 7, wherein the universal synchronous/asynchronous transceiver has a data output connected to the said exciter-transistor, a data input connected to said opto-coupled unit and an input connected to the said phototransmitter which corresponds to said control means for closing of the connecting unit.
Claim 10
Dependent Claim 19 words
The intelligent interface of claim 8, which includes a medium of visualization of texts received which comprises a printer.
Claim 11
Dependent Claim 46 words
The intelligent interface in accordance with claim 1, wherein said received texts memory means is connected to the input of the said input and output port and wherein said medium of visualization of said received text comprises a cathode ray tube screen of the said computer.
Claim 12
Dependent Claim 22 words
The intelligent interface of claim 1, wherein said character analyzer means includes an end of message detector and an answerback request detector.
Claim 13
Dependent Claim 25 words
The intelligent interface of claim 11, which includes a micro data processing device comprising said end of message detector, said answerback request detector, and dial.
Claim 14
Dependent Claim 19 words
The intelligent interface of claim 12, wherein said micro data processing device comprises said addresses' telex numbers memory means.
Claim 15
Dependent Claim 45 words
The intelligent interface, according to claim 11, wherein addressees' telex numbers memory means possesses a reading input connected to a schedule comparator, which in turn is connected to a clock and a sending schedules memory having an input connectable to said input and output port.
Claim 16
Dependent Claim 41 words
The intelligent interface according to claim 14, wherein said Baudot signal transmitter means is connected to means for generating a request for addressees' answerback signal and said Baudot signal receiver means is connected to the input of an addressee answerback verifier.

References Cited (Backward Citations)

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1992-02-07 1992-08-08 1993-02-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1996-02-07 1996-08-08 1997-02-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2000-02-07 2000-08-08 2001-02-07 $7700.00 Window Closed / Lapsed

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